Asphalt heater



Nov; 18 1924' J. H. BLEDSOE v ASPHALT HEATER Filed Oct.

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J. H. BLEDSOE ASPHALT HEATER 7, 1922 4 Sheets-Sheet 2 Filed Oct.

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J. H. BLEDSO ASPHALT HEATER Filed oct'. 7, 1922 4 Sheets-Sheet 5 IN VENTOR A TTRNE Y J. H. BLEDSOE ASPHALT HEATER l Nw, "18, 1924.

Filed Oct. k7, 1922 4 Sheets-Sheet 4 TTORNE y 45 nozzles.

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H. BLEDSOE, OF CITY, MISSORI, ASSIGNOB TO EQUITABLE ASPHALT TENANCE COMPANY, F KANSAS CITY, MISSOURI, A CORPORATION OF MIS- ASPHALT HEATER.

.Application lid October 7, 1922. Serial No. 593,081. v

To all whom it may concern:

Be it known that I, JOHN H. BLnDsoE, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Asphalt Heaters; and I do declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and use the same, reference being had to the ac-`.

companying drawings and to the figures of reference marked thereon, which form a part 4 of this specification.

This invention relates to surface heaters and more particularly toa machine for softening the top coat of asphalt pavement as an initial step in re-surfacing the pavement, the principal object of the invention being to rovide4 a strong, light machine including lieat generating and applying means easily controllable and adjustable from the driver s position.

- Asphalt softening machines heretofore used have been propelled by steam, necessitating heavy, cumbersome organizations. My invention contemplates the provision of vmeans whereby the machine can employ in its-own make-up a motor vehicle propelledl 80 byflj'an explosion motor as the prime mover, ,y and further contemplates the provision of means forl making the machine comparativelyvli ht while at the same time rendering itv high y efficient and easy to operate.

'y as.. well asvits manifold advantages will be understood by reference to the following de `scription in connection with the accompany ing drawings, in which- Fig. 1 is a side elevational view of an asphalt softener constructed in accordance with my invention.

' Fig. 2 is a rear view of the' machine, the furnace being broken away'to show the'air Fig. 3 is a vertical sectional view of the machine on the line 3--3, Fig. 1.

Fig. 4 is a top plan view of the chassis of the motor vehicle, showing the driving mechanism carried thereby.

Fig. 5 isA an enlarged, sectional view through part of the furnace.

Fig. 6 is a cross sectional view through 'anis1n. t

lThe novel constructionv of the invention the furnace showin the cradle for supporting it and the springs for supporting the cradle, one of the springs being shown in section, and Y Fig. 7 is an enlarged view of the gearing for transmitting motion from the` drive .t

shaft of the m'otor tov certain pumping mech- Referrin now to the drawings by numerals of re erence: l 1 designates the chassis -of'the motor vehicle supported by the front wheels 2 and 3 and the rear wheels 4 and 5, the latter being but these specifically form no part of my iny ventionso it is thought it is quite unneces-t? sary to illustrate them in detail.

The drive shaft 8 ofthe motor carries a pinion 9, which meshes 4witha gear 10 and a gear 11, the gears 10 and 11 being on opposite sides of the longitudinal center of the motor. The gear 10 is fastened to a shaft `12, mounted in bearings 13 and 14 on the chassis frame and the gear 11 is keyed orv v fastened to the shaft 15, mounted in bear- 17 on the shaft 18, mounted .-in' bearings 19 and 20 transversely of the chassis so that the shaft 18 may. be driven from the engine,

there being, 'of course, atiansmission gear 21 intermediate the ends of the shaft 15as will be well understood.

The shaft 18 carries sprocketsl22 and 23,

which communicate motion to the sprockets 24 and 25, rigid on the wheels 4 and' wheresusl by the wheels willbe. driven in the usual l way.

' Insteady of providing the brake drums on the axle 6I prefer to arrange them on the shaft 18 and they are designated 26 and 27.

They are adapted to be operated by a brake lever -conveniently adjacent t'o the driving seat of the vehicle.

In Fig. 1 I have shown the brake drin-i127 in elevation with the brake band 27 about through the medium of a lever 29 and a link 30 havin a brake link 31. 'lhis construction'is ol and any means may be employed for applying the brakes.

'lhe shaft'l'can be connected to and disconnected froin the gear 11 by a'clutch 32 appropriately operated. @n the shaft 12 is a clutch 32 adapted to clutch and disconnect lthe sprocket 33 from the shaft 12 and there is a sprocket 34 loose on the* shaft 12 adapted to be clutched to and disconnected from. the shaft l2 through the clutch 35. When the .clutch 32 is out and the vclutch 35 is out,

the shaft 12 will rotate idly. When the clutch 32' is in, however, the sprocket 33 will be rotated and when the clutch 35 is in, the sprocket 3d will be rotated. When the -sprocket 3d is .rota-ted, it will drive a is on the shaft of a liquid nel pump d3 the of vitrited or reracto inlet of which is connected to a pipe del having its inlet end 4:5 at the front of the machine so that the pum can draw oil from a supply tank or `barre through the pipe dt and discharge it into the fuel reservoir t6 through the ipe 47. 'lhe fuel reservoir d6 is supported y 'a superstructure consisting of an appropriately construct/ed frame d8, carried by the chassis vofthe vehicle in rear of the.- cab t9 in which the operator sits. The tank may be of any appropriate size and construction.

Below the tank or reservoir t6 is a furnace consisting of an elongated member or cylinder 50, closed at its respective ends and having a down-port 51 to which is connected a hood or canopy 52 of appropriate construction adapted to be supported from the chains 86 (hereinafter described) and by the kids 53 and 5t on the lower edges of the The furnace is rovided with a lining ,55 material whereby heat will be retained Wit in the furnace and conserved to become most etfective within the hood so as to have a high melting eldect on the as halt.

rllhe fue is supplied for the furnaceboth from the reservoir t6 and from the air tank' 56. The air tank receives its compression froman impeller or piump 57, the intake of which is at 58 and w ich is provided with. a screen 59.- 'lhe outlet for the impeller `or pump57 isratd60 andtit discharges into the drum or tank 56 through the rll`he air from the tank 56 is dischargd pipe 61.

neiaiei throughA a ipe 62 (see Figs. l1 and* 3) into a manifol 63, having nozzles 6d and 65 which enter the front of the furnace and which surround injector' nozzles 66 and 67'.,

to which the hydrocarbon content of the fuel mixture is carried from the fuel tank d6 through a pipe 68. The hydrocarbon nozzles can he controlled through the medium of the valves 69 and 70, it being apparent by reference to ll? ig. 3 that the pipe or hose is between the nozzles so that one nozzle 6d can be closed while duid is admitted through valve 70 to nozzle 65 or valve 70 can be closed while valve 69' is o en or both valves can be open. 'lhe air com ines with the h drocarbon content to make a. combustible mixture, the oxygen in the air supporting combustion as is well understood.

'llhe manifold 63 is connected to a superposed manifold 71 which has ipe connections 72 and 73 running longitudinally of the furnace and which terminate in disn charge Anozzles 7d and 75, discharging through openings 76 and' 77 in the furnace above the down-pipe 51 so `that the air di rected through the opening .51 will create a draftto cause heated airto be dran/ni through the furnace and directed against the asphalt beneath the hood.

'llhe'furnace is supported at one end by trunnions 78 and 79, which are mounted in brackets on the frame t8. @nly one bracket.

is shown in Fig. 1, there being a corresponding bracket on the otherl side of the frame.

he rear end of the furnace 56 is suspended from the piston rod 80 ofthe hoist cylinder 39. llhe piston rod 80 (see Fig. 2) has a cross bar 81, from the respective ends of which. hang rods 82 and 83. These are connected at their lower ends to straps 8d and 85, which are fastened to the side of the furnace and the lower ends of the straps carry chains'86, which are fastened to the hood 52 so that the hood will be raised when the rear end of the furnace is raised. The chains 86 are crossed, those connected with the forward corners of the hood collar 52 having links seated in rearwardly projecting seats 84:" and 85 on'the straps 8d and 85, and the rear chains having links seated in corresponding forwardly projecting seats on said straps. when the furnace is swung on its trunnions, the front end of the hood will be lifted from a point lfurther from the furnace anis than that from which the rear end of the hood is lifted, thereby equalizing the tilting of the hood which 'would otherwise occur. The

vedualization ofmovement of the hood is po ill@ With this arrangement,-

' through the 'pipe 8.7,"tov raise the piston (not the pump through the pipe 87 and back into i the cylinder through the pipe 88.`

' y The specific construction of the hoist conraising and lowerin stitutes no part of the invention except in so far as it is associated with the method of the rearv end of the furnace and controlling the hood.

In order to resiliently support the rear end of the furnace I provide a sling 89 which consists of a strap having oppositely extending ends 90 fand 91, through which rods 92 and 93 project, the lower ends of the rods having nuts 94 and 95, upon which rest the ends 90 and 91 of the strap 89. The upper ends of the rods 92 and 93 are hooked, as at 96 and 97to engage the links 98 and 99 carried by the hooked ends 100 and 101 of the rods 102 and 103. The upper ends of the rods 102 and 103 carry butt plates 104 and 105, through each of which the rods on one side of the furnace extend, there being nuts 106 and 107 on the ends of the rods resting on the plates.

The upper ends of the springs 108 and 109 abut against the abutments 104 and 105 and the lower ends rest on the top bar of the superposed frame 48 so that the 'springs constitute resilient or cushioning means for the sling in which the otherwise unsupported end of the furnace rests.

It will, therefore, be noted that there is a resilient means provided for supporting the turnace and particularly the hood so that the skids 53 and 54 will be practically on the ground hut so that the device can travel over the ground without havin the weight machine is backed. As the rods 1.1.0 andv the ieurnace proper, the

ci? the furnace .hearing directy upon the skids. @it course, the nuts on. the ends ot the rods 11.02 and 103 can he adjusted so that the skids willi barely touch the ground.

The hood, besides being fastened to or supported by the straps and Se, is connested to the axle 8 by thespacing rods 11.0 iii whereby the hood is drawn ieru wardiyon its skids when the machine is ad; vanced and is pushed marwardly when the lil are rigid, they have the etect ofradius rods, and. as' they have shorter radiithan accelerate movement of? Athe rear end o the hood, merely maintaining the levei of the hood during its vertical movement. c This acceleration or the hood changes the angle or the hood col# lar 52'" relative to the furnace down-port 5i. Tio permit this movement on a variable ani .e l erasuciently greater than the diameter of the down-port to aord the necessary cl ar @five the collar 52 an interior diamo# ances, and to minimize loss lof heat from the hood I rovide the collar 52 with an overlyingco ar 52" having an interior diameter less thanthat of the collar 52 but 1 also affording proper clearance.

The rods 110-111 also comprise turnbuckles 110--111v so that should it be necessary to replace a hood, any variations in dimensions may be taken care of by adjustment in the turn-buckles.`

To avoid lateral strain on the furnace trunnions should the machine be turned while the hood is' in contact with the ground, I provide guides 113v (Fig. 2) which are mounted on the chassis 1 and frame 48 and lie alongside the rear end of the frame so that vin the event that the machine is turned as described, the uides will contact the frame and relieve t e trunnions from strain. From the-foregoing `it will be observed that the machine is light, that it can be readily opera-ted so as to takeon fuel, feed it to the furnace, direct ithe heated air against the surface of the asphalt, that the furnace can bev properly fed with the 'fuel or the fuel cut off' when desired, that the furnace portion of the mechanism need not operate when the machine is moving but can o erate when the machine is moving if deslred, that the power parts of the plantean absorb the power of the prime mover of the motor vehicle, that the vhoodmay be positively advanced or badked with the furnace,

and that all of the parts are under the control vof the driver in the cab. Therefore, the device is simple in construction and well adapted to perform thefunction for which A it is intended. y `What I claim and desire to ters-Patent is:

1. A surface heater comprising a furnace having ivotal mounting and resilient su port, an a hood in communication with t e furnace.

2. In combination with a vehicle traine, a furnace having pivotai mounting on the frame at one side of the longitudinai center of the frame, means resiiiently supporting secure by Let- Athe furnace at the other side ci longs nection for resiliently supporting the fura iis drance, ineens for supplying heet to the furnace, and o hood communicating with the furnoce.`

5. lin combinntion with n portable support, n furnace having o closed end end en outlet opening, n` hood in communicetion with the opening, ineens for pivoting the furnace neer; its closed end to the support, and means for resiliently supporting the other end of the furnace., Y

6. In combination with n portnble support, n furnace hnving n closed end ond an outlet opening, n hood in communication `with the opening, rnennsfor pivoting the Iturnnce neer its closed end tothe support, moons for resilientiy supporting the other end of the furnnce, und a. hoist for swinging the furnace about its pivot.

7. In combination with o motor vehicle, a superstructure cnrried.` by the chassis of the motor vehicle, n urnnce pivotnlly supported by the superstructure end hei/ing n downwnrdly directed opening, moons for resiliently supporting the end of the fur-nece distant from its pivotal portion, ineens for swinging the furnece about its pivotni conl .nection, nnd n hood in communicntion with Lerenti seid opening end ndnpted for conning het gosen to heet n surrnce.

8. In comhinntionwith n vehicle freine, n furnace pivotnlily mounted on seid treme und hnvin n down-port, o, hood dexibiy susended be ow the'furnece and hnving e, coler surrounding the down-port, ond rods pivotnily connecting the hood sind rnrne, the hood'rndius being shorter than the turnoce rndius and the hood coller hnving clenrnnce on the down-port, for the purpose set forth.

9.. In comhinution with n vehicle frame, n furnace pivotnliy mounted on seid freine ond having n down-port, e hood dexibiy suspended from seid furnace und having n coller surrounding the down-port, the coiier spaced from the down-port to ntibrd clemence, n coller having less clemence than the first named collar, und rods connecting the hood end frame to push or pull the hood with snid frame.

In testimony whereof if om my signea ture.

donn n., nnnnson.

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